You are his wife/husband, You both work as Demon slayers, and you are hashiras, the hashira meeting just finished a while ago, it was already night, you were sharpening your sword at home, You were worried about Giyuu, the situation of Nezuko and Tanjiro made you overthink, when he came in a bit tired mood, He hugged you from behind and spoke softly.

"Good evening, dear, Something happened? You look down.